University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 14 Resistance Network
Solution to Lab Quiz Problem 14.1(Why Kirchhos Loop Equation True?)
Problem: Which of the following laws or principles is true primarily because the total work done on an electric charge around any closed path i
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 18 Adding Magnetic Fields
Solution to Lab Quiz Problem 18.1(RHR example)
Problem: You draw a coordinate system with + pointx ing to the right of the page and + pointing into the page. y In what direction is + for a righthanded coord
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 26 Optical Elements
Solution to Lab Quiz Problem 26.1(Wavelength of Orange Laser)
Problem: Orange light with wavelength 600nm in vacuum is incident on a material with index of refraction 50. Calculate the velocity and frequency of th
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 19 Force and Torque
Solution to Lab Quiz Problem 19.1(Wire Floating in Magnetic Field)
Problem: A long wire carries Ilw = 2.0 103A down the x axis. A wire segment of length 20.0cm with mass 100.0g = 0.1000kg carrying Isw = 100.0A in
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 21 Inductance
Solution to Lab Quiz Problem 21.1(Current Needed to Double the Energy Stored by an Inductor)
Problem: When a current I ows through a given inductor, the inductor can store an energy U . For the same inductor to store an
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 22 RL Circuits
Solution to Lab Quiz Problem 22.1(Eect of a Loop on Another Loop)
Problem: Loops 1 and 2 are parallel. Immediately after the switch is closed, what happens to loop 2? Select One of the Following: (a) Loop 2 is not aect
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 17 Magnitude of Magnetic Field
Solution to Lab Quiz Problem 17.1(Relative Magnitude of Current Elements Placed Around Circle)
Problem: In the gures below, all the current elements, Id, have the same magnitude. Record the label of the
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 15 Conductor in Electric Field
Solution to Lab Quiz Problem 15.1(Time Constant of Human Body)
Problem: Your skin resistance is about 5000 and your capacitance is about 100pF. What is the time constant of your body? Select One of the
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 13 Resistance Networks
Solution to Lab Quiz Problem 13.1(Voltage Across a Device in a Series Circuit Given the Voltage Across the Other Device and the Battery)
Problem: Two devices are connected in a series circuit with a 9V battery.
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 12 Capacitance
Solution to Lab Quiz Problem 12.1(Energy of Earth)
Problem: Modelling the Earth as isolated spherical conductor with radius 6.4 106m and electric eld of 150 N C downward at its surface. Compute the energy stored in the
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 6 Spherical Systems
Solution to Lab Quiz Problem 6.1(Flux Through Hoop Normal Perpendicular)
Problem: A hula hoop of radius 1.0m is in a uniform electric eld with magnitude 1.0 102 N . Its normal is C perpendicular to the eld (carefu
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 11 Potential Dierence
Solution to Lab Quiz Problem 11.1(Sign of Potential Energy Given Work)
Problem: If an external agent does positive work on a system, what happens to the potential energy of the system. Select One of the Followin
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 20 Faraday
Solution to Lab Quiz Problem 20.1(Which hoop has zero ux?)
Problem: The gures below show the side view of a circular hoop in a uniform electric eld. Which gure below has zero net ux through the hoop? Select One of the Foll
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 23 Exam III Review
Solution to Lab Quiz Problem 23.1(What is dl?)
Problem: Amperes law states that B d = 0Iencircled
C
What is d? Select One of the Following: (a) A segment of the wire. (b) A vector in the direction of the eld. (cAn
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 23 Optical Systems
Solution to Homework Problem 23.1(How long to accelerate to light speed?)
Problem: A problem you should have easily been able to do in UPI, but I get asked it all the time when I ask for a good question on electric
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 22 Optical Elements
Solution to Homework Problem 22.1(Describe Image from Magnication)
Problem: An image has magnication 0.5. Which of the following describes the image? Select One of the Following: (a) enlarged, upright. (b) enlarge
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 21 Light
Solution to Homework Problem 21.1(Wavelength of AM Radio)
Problem: The rock AM station out of Canada that I listened to while growing up in Michigan had a frequency of 1150kHz = 1.15 106 Hz. Calculate the wavelength of the r
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 19 RL Circuits
Solution to Homework Problem 19.1(Resistance Given Time Constant)
Problem: A RL circuit has a time constant, , of 40s and an inductance, L, of 3H what is the resistance of the circiut? Select One of the Following: (a)
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 18 Inductance
Solution to Homework Problem 18.1(What Makes Second Speaker Work?)
Problem: In lab, the second speaker we built was made with a xed magnet and a coil attached to a vibrating board. What physical law in most important in
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 17 Faradays Law
Solution to Homework Problem 17.1(Trajectory of Particle in Magnetic Field)
Problem: A proton has velocity 3 107 m in the direction drawn s when it passes through point P . The magnetic eld has strength 3T. The proton
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 16 Magnetic Force and Field
Solution to Homework Problem 16.1(Interaction of Point Charges)
Problem: A proton with charge (+e) is xed at the origin. An electron with charge (e) is xed at the point (1cm, 0, 0). What is the direction o
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 15 Adding Magnetic Fields
Solution to Homework Problem 15.1(The Magnetic Field Direction Due to Two CurrentCarrying Wires at a Given Point)
Problem: The gure shows two currentcarrying wires, one current pointing out of the page and
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 14 Introduction to Magnetic Fields
Solution to Homework Problem 14.1(Magnetic Field of Pith Ball)
Problem: A pith ball is charged with an electrophorus to 1nC and shot along the xaxis at 100 m in the +x s direction. What is the magn
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 13 RC and Review for Exam 2 (Required but not Collected)
Solution to Homework Problem 13.1(Time Dependence of Decaying Exponential)
Problem: Given the plot below of the voltage across a resistor through which a capacitor is dischargi
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 12 Kirchhos Laws
Solution to Homework Problem 12.1(Reduce Resistance Network)
Problem: For the circuit to the right, with R1 = 5.0, R2 = 10.0, and R3 = 15, and V0 = 6.0V. What is the current owing through R3 ? Select One of the Follo
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 11 Beginning Circuits
Solution to Homework Problem 11.1(What is the same in parallel?)
Problem: For a parallel combination of unlike resistors, which of the following is the same for each resistor? Select One of the Following: (a) Cu
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 10 Computing with Capacitance
Solution to Homework Problem 10.1(Energy of Charged Sphere as Radius is Changed)
Problem: How does the energy of a uniformly charged spherical shell change as the radius of the sphere is increased withou
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 9 Computing Potential Dierence
Solution to Homework Problem 9.1(Gauss Law for Parallel Planes)
Problem: Two innite parallel planes of xed charge 2 and 3 are held a distance d apart as shown below. A neutral conducting slab of thickne
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 8 Computing the Fields of Conductors and Dielectrics
Solution to Homework Problem 8.1(Charge Density on Hubcap)
Problem: A metal hubcap (a conducting metal disk) lays at on the ground. The earth produces an electric eld of E = 150 N
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 7 Conductors and Dielectrics
Solution to Homework Problem 7.1(How is Field Reduced in a Conductor?)
Problem: Which of the following best describes how a conductor lowers the electric eld in its interior? Select One of the Following: